Journal
SMARTMAT
Volume 2, Issue 3, Pages 263-285Publisher
WILEY
DOI: 10.1002/smm2.1059
Keywords
biopotential electrode; conducting polymer; PEDOT; strain sensor; stretchable conductor; transparent electrode
Funding
- Ministry of Education of Singapore [R-284-000-197-114]
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Intrinsically conducting polymers (ICPs) have important applications in flexible electronics due to their high conductivity, mechanical flexibility, and biocompatibility. These polymers can be enhanced through secondary doping or blending with soft polymers to improve their conductivity and mechanical stretchability, making them suitable for flexible electrodes, bioelectric monitoring, and strain sensors.
Intrinsically conducting polymers (ICPs), such as polyacetylene, polyaniline, polypyrrole, polythiophene, and poly(3,4-ethylenedioxythiophene) (PEDOT), can have important application in flexible electronics owing to their unique merits including high conductivity, high mechanical flexibility, low cost, and good biocompatibility. The requirements for their application in flexible electronics include high conductivity and appropriate mechanical properties. The conductivity of some ICPs can be enhanced through a postpolymerization treatment, the so-called secondary doping. A conducting polymer film with high conductivity can be used as flexible electrode and even as flexible transparent electrode of optoelectronic devices. The application of ICPs as stretchable electrode requires high mechanical stretchability. The mechanical stretchability of ICPs can be improved through blending with a soft polymer or plasticization. Because of their good biocompatibility, ICPs can be modified as dry electrode for biopotential monitoring and neural interface. In addition, ICPs can be used as the active material of strain sensors for healthcare monitoring, and they can be adopted to monitor food processing, such as the fermentation, steaming, storage, and refreshing of starch-based food because of the resistance variation caused by the food volume change. All these applications of ICPs are covered in this review article.
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